/Engine/Plugins/Importers/USDImporter/Source/USDClasses/Public/USDAssetCache2.h
Returns all asset hashes tracked by the asset cache, for all storage types. This includes unloaded persistent assets
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="USD", Meta=(CallInEditor="true")) [TArray](API\Runtime\Core\Containers\TArray)< [FString](API\Runtime\Core\Containers\FString) > GetAllAssetHashes() const